To counting of red-tooth shrews (Insectivora, Soricidae) [Russian]

摘要

Individual marking of red-toothed shrews was carried out using an original device consisting in a pitfall connected with a cage-box supplied with food.1 In these boxes, animals may stay alive at least for a day. Traps were also set over the same area. The data on 436 red-toothed shrews from pitfalls an 958 animals from traps were analyzed. Nonresidents were shown to fall predominantly into pitfalls, whereas residents, to traps. About 2% of the animals were caught by the both devices. Samplings obtained by pitfalls and traps differed significantly in the demographic structure, species composition, as well as in the behavior of animals. The community structure assessed on the basis of the data obtained using different traps was different. Thus, the use of traps only of one kind may produce incorrect data on the composition of shrew population, since pitfall may not catch residents and traps, nonresidents. Acording to our data, populations of residents and nonresidents in red-toothed shrews are approximately equal.